<script>
var message = "";
function clickIE(){
  if (document.all){
   (message);
    alert('holaie');;
  }
}



function clickNS(e){
  if (document.layers || (document.getElementById && !document.all)){
   if (e.which == 2 || e.which == 3){
      (message);
    	alert('holans');;
   }
  }
}

if (document.layers){
  document.captureEvents(Event.MOUSEDOWN);
  document.onmousedown = clickNS;
} else {
    document.onmouseup = clickNS;
    document.oncontextmenu = clickIE;
   }
   document.oncontextmenu = new Function("return false")
</script>